Island



(No Model.) 3 Sheets-Sheet 1.

F. M. BROWN. STEAM ACTUATED VALVE.

N0.-467,Z'74. Patented Jan. 19, 1892.

ITNESSES (No Model.) 3 Sheets-Sheet 3.

F. BROWN. STEAM AGTUATED VALVE.

No. 467,274. Patented Jam 1 9, 1892.

f rill/1 n UN TED STATES- PATENT OFFICE.

FREDRIC M. BROXVN, OF WARREN, RHODE ISLAND.

STEAM-ACTUATED VALVE.

SPECIFICATION forming part of Letters Patent No. 467,274, dated January19, 1892.

Application filed April 28, '1891.

To all whom, it may concern:

Be it known that I, FREDRIO M. BROWN, of Varren, in the county ofBristol, State of Rhode Island, have invented certain new and usefulImprovements in Steam Actuated Valves, of which the following is adescription sufficiently full, clear, and exact to enable any personskilled in' the art or science to which said invention appertains tomake and use the same, reference being had to the accompanying drawings,forming part of this specification, in which- Figure 1 is a sideelevation of my improved pump; Fig. 2, a vertical longitudinal sectionof the same; Fig. 3, an elevation of the main steam-valve detached; Fig.4, an end elevation of the steam-cylinderchest, looking from the rightin Fig. 2, the heads being removed; Fig. 5, a vertical transversesection of the steam-chest; Fig. 6, a horizontal longitudinal section ofthe same, showing the exhaust; Fig. 7, a like view of the steam-valve;Fig. 8, a cross-section of the water-cylinder, showing the method offastening the valve-seat; Fig. 9, a plan view of the valve-seat; Fig.10, a face view of the water-valve; Fig. 11, an edge View of thevalve-seat, and Fig. 12 an elevation illustrating certain details ofconstruction.

Like letters and figures of reference indicate corresponding parts inthe different figures of the drawings.

My invention relates to steam-pumps provided with horizontal steam andpump'cylinders, and is designed, especially, as an improvement on thedevice shownin my Letters Patent, No. 421,159, dated February 11, 1890,and granted to me for new and useful improvements in steam-pumps.

In the drawings, A represents the steamcylinder and B thewater-cylinder, these parts being arranged horizontally in alignment andthe water-cylinder being less in diameter than said steam-cylinder, asbest shown in Fig. 2. The piston 12 ot' the steam-cylinder and thepiston (Z of the water-cylinder are rigidly connected by a piston-rod),which works horizontally in the cylinder-heads g 71.

The steam-chest 0, provided in its top with a supply-port i, is mountedon top of the steam-cylinder A and is provided centrally at portion.

its rear side with an exhaust-port j, which Serial No. 390.808. (Nomodel.)

The ends of said chest are enlarged anteriorly at Z,'and the duct 76 isformed in the walls of said chest, its ends opening into said enlarged Drepresents the steam-valve considered as a whole. This valve workslongitudinally in the chestO, its ends being provided with annularflanges m, which work in the enlarged portions Z of said chest. Thevalve is provided centrally with flanges p, of less diameter, which workin the main-chest cylinder q. A solid valve E '(see Fig. 2) is fitted toslide longitudinally in the main valve D.

An annular steam-chamber r in the top of the valve D has a ducttopeninginto the seat of the valve E, the steam-supply port 2' openinginto said chamber. A similar annular steam-chamber v is formed in themain valve near its forward flange m. Ducts 10 lead, respectively, fromthe bottom of the seat of the valve E at equidistant points from. theportt through the body of the valve D and open into the steam-chest atopposite ends thereof.

Ducts w y respectively lead from the bottoms of the chambers r 12 intoopposite ends of the steam-cylinder A. V A balance-port 15 is formed inthe bottom of the main valve D and is of suitable length to connect theports at y at a determined point in the travel of said valve.Exhaust-ports 40 are formed in the top of the valve-body and open intothe seat of the solid valve E. A cushion-port 16 has one end openinginto the live-steam chamber 1, its opposite end opening into ahorizontal duct 18 (see Fig. 7) in the body of the valve D, said duct 18opening throughone of the flanges p and leading longitudinally outwardthrough the end of the valve D. Asiinilarlyarranged duct '19 (see Fig.7) opens through the companion flange m and leads through the oppositeend of the valve D. A regulating screw-valve 17 is turned through thewall of the chest 0 and projects into the port 16.

A valve E is provided with suitable flanges for closing the exhaust 4.0,port 25, and ducts w. The stem 22 of said valve (see Fig. 2) slides in abushing 21, which has its inner end threaded and turned into the end ofthe seat of said valve E, said bushing being suit.- ably packed andfitted to slide in the chesthead 45. Atube or bushing td is turned intothe opposite end of the valve I), registering with the seat of the valveE, and is fitted to through, if desired, without dismounting the chestwalls or heads. The chest is formed in two sections 48 and 49, havingflanges 50, which are bolted together, (see Figs. 4 and 5,) suchconstruction being essential in order to mount the valve D therein. Arod 51 is fitted to slide longitudinally in the cylinderheads 9 71-,said rod projecting into said cylinders in position to be engaged bytheir respective pistons. Avertical bar52 issecured to said rod betweenthe water and steam cylinders. The outer end of the valve-stem 22 isthreaded at 53 and is fitted to slide freely through the upper end ofthe rod 52. Strapnuts 24, turned onto said stem, regulate the strokethereof. Said nut is shown in detail in Fig. 12 andhaslaterally-projecting lugs 54:, connected by a screw 55, whereby itmay be clamped onto said stem to prevent its working loose.

As shown in Fig. 4, the valve E is mounted in the valve D above thecenter, the duct w being formed vertically below said valve-seat and theduct 19 in a vertical plane parallel therewith. A rod 20 has one endsecured in the valve D below the duct to and is fitted to slide freelyin the head 45 of the steamchest. Said rod is threaded at 55 and passesfreelythrough the vertical rod 52, nuts 24: being disposed on saidthreaded portion.

The water-cylinder B has ports 25 leading from the bottom of thewater-chest F, disposed on the top of said cylinder, into opposite endsthereof. The supply-port 27 opens by a duct 28 into the bottom of thewaterchest F centrally between the ports 25. The valve-seat 26 isdisposed on the floor of the chest F. Said seat is provided with ports60, (see Fig. 9,) which register with the ports 25 and with a centralport 28, registering with the supply-port. The valve-seat is groovedlongitudinally at 61 on its edges, (see Fig. 11,) and is held inposition by a set-screw 62, (see Fig. 8,) passing through the walls ofthe chest F into said grooves.

The valve H is shown in face view in Fig. 10. Said valve is providedwith a link 32, by which it is secured to an end of the rod 20. Thevalve slides flatly on the seat 26 and is provided with a central duct31, of sufficient length to connect the supply 27 with either of theports 25. Chambers 29 and 30 are formed in the valve in position toregister with the ports 25. A vertical cylinder J is disposed on top ofthe chest F and opens therein. A piston 35 is fitted to slide in saidcylindelz Said piston is provided centrally with a socket, in which aball 38 on one end of a rod 39 is mounted. A take-up screw 37, turnedinto said piston, engages said ball and forms the upper wall of thesocket. Packing 30 is held in position by being turned onto the stem ofsaid take-up screw. A ball is formed on the lower end of the rod 39 andworks in a suitable socket disposed cen tral] y in the top of the valveH. The purpose ot said piston, ball, and socket is to balance said valveby direct Water-pressure. A discharge-port 66 opens into the forward endof the valve-chamber of the chest F.

The parts are shown in the drawings as 1n the position they assume atthe completed stroke of the piston. For the return stroke the steam,entering the steam-chest through the chamber 1', passes throughthe portw and drives the piston 1) forward. When said piston engages the rod 51,the valve-stem 22 is moved thereby, drawing the valve E with it. Thecentral flange of said valve passes the port t, admitting steam from thechamber a through the port 10 and between the outer head of the valve Dand piston-head 47, the corresponding exhaust 40 being at the same timeclosed by the end flange of said valve. The main valve D is thus drivenforward, and during its forward movement the balanceport 15 will for amoment register with the cylinder-ports a: and y and convey steam fromone end of the cylinder to the other and equalize the pressure,preventing the piston from striking the cylinder-heads when running at ahigh rate of speed. As the valve D reaches the end of its forwardmovement the flange p and port 18 register with the cushion-port 16 andsteam is admitted behind the valve D, thus cushioning the movement ofsaid valve and balancing the same. An inner exhaust 40 of the main valveis opened by the movement of the solid valve E, permitting the steam tobe exhausted from the inner end of the chest through the port w into theexhaust 7c. The movement of the valve D drives the rod 20, and with itthe water-valve H. The forward movement of the water-piston cl forcesthe water through the port 25 and out the discharge 66. The pressure ofthe water in the chest-chamber bears against the piston 35 and downwardinto the valve II. As the valve moves forward its port 31 connects theouter port 25 with the supply-port 27, enabling the water to be drawninto the cylinder on the return stroke-of its piston. The pressure ofthe water being upward on the piston 35 relieves or counteracts thedownward pressure on the valve H, the ball-and-socket'joint workingfreely and not interfering with the action of said valve. As the ports29 or 30 of the valve II register, respectively, with the Water-ports25, the spaces formed by said ports 29 and 30 serve to cushion the waterin the cylinder and prevent said valve from rising from otf its seat 26.

By constructing the valve E solid and arranging the ports as described Iam enabled to increase the diameter of the flanges m of the piston-valveD without increasing the waste or leakage from the steam-valve. Thisenables any desired amount of power necessary to move the watervalve Hto be attained I'IS without increasing the size of the steam-valve.Moreover, by arranging the balance-port 15 as described I am enabled toconvey steam from one end of the cylinder to the other and equalizethe'pressure, preventing the piston from striking the cylinder-headswhen at high rate of speed.

By the ports 18 and 19 and cushion-ports 16 direct steam is supplied forcushioning the main valve D. The amount of such steam may readily begaged by means of the screwvalve 17.

By mounting the steam-valve E above the center of the main valve D roomis effected for conducting the driving-port to, balanceport 15, andcushion-ports 18 and 19.

My peculiar construction of steam-chest, whereby said chest ist'ormed in sections bolted together, enables the valve D to be mounted thereinwithout forming the valve-flanges separable. The bushing 21 and tube 46prevent the steam outside the main valve D from acting on the ends ofthe solid valve E and interfering with its proper action by steam fromthe ports. 24 and threaded sleeve 53 from the valvestem 22 saidvalve-stem may readily be withdrawn from the tube 46 without removingthe main valve D.

In the Letters Patent above referred to the flanges p m on the valve Dare constructed of the same size. In my improvement the end flanges areof much greater diameter than the central flanges p, whereby thesteam-leakage is greatly reduced and a larger amount of direct power onthe Water-valve is attained.

The peculiar method of mounting the valveseat 26 for the water-valveenables the same to be readily removed for grinding or replacingbydetaching one of the sides of the water-' chest. I

Having thus explained. my invention, what I claim is 1. The combination,with the steam-chest provided with the supply and exhaust ports and thecushion-port 16, of the main valve D, provided with the ducts l8 and 19,arranged to operate substantially as specified.

2. The combination, with the steam-chest, of the main valve fitted towork therein and provided with the ducts 18 and 19, a cushionport insaid chest adapted to register with said ducts, and a regulator, as 17,forsaid port, substantially as described.

3. The combination of the valve chest formed in two sections 48 and 49,having a central contracted portion and enlarged ends, andthe valve D,having central flanges fitting the contracted portion of the valve-chestand enlarged end flanges fittingthe enlarged ends of said valve-chest,substantially as described.

By removing the nuts I 4. The combination of the steam-cylinder,steam-chest, and connecting-ducts, the main valve provided with achamber for a sliding valve and having a steam-supply chamberalternately communicating with said ducts, ports communicating with saidsteam-supply chamber and with the opposite ends of the steam-chest, acushion-port in said steamchest, ports in said main valve communicatingwith the opposite ends of the chest. and alternately communicating withsaid cushionport, and a sliding valve located in the said chamber in themain valve, substantially as described.

5. The combination of the steam-cylinder, the steam-chest havingenlarged ends, connecting-ducts, the main valve having enlarged endflanges fitting in said enlarged ends of the chest .and provided with achamber for a sliding valve, a sliding valve fitting within saidchamber, the main valve havin a steamsupply chamber alternatelycommunicating with said ducts, ports communicating. with saidvalve-chamber and with the opposite ends of the steam-chest, and anexhaust-port located in the steam-chest and communicating with theenlarged ends of said chest at points between the enlarged flanges ofthe main valve, substantially as described.

6. The main valve D, provided with a seat for a sliding steam-valve, incombination with the valve E, mounted in said seat, a tube registeringwith said seat and opening through the chest-head, and a bushing in theopposite end of said seat fitted to slide in the opposite chest-head,substantially as described.

7. The combination of the valve E, provided with the stem 22, having athreaded portion 53, with the nut-strap 24, disposed on said threadedportion, and actuating mechanism for said valve, substantially as setforth.

8. The steam-cylinder, chest, and connecting-ducts, in combination withthe main valve provided with the cushion-ports and balanceports, and thesteam-valve mounted eccentrically in said main valve, substantially asand for the purpose set forth.

9. The combination of the steam-cylinder, waterchest, connectingducts,water-cylinder, steam-chest, the connected pistons, the main valve insaid steam-chest provided .with the balance and cushion ports, the solidsteamvalve disposed eccentrically in said main valve, the water-valveand water-actuated-balance mechanism, and mechanism actuated by thecylinder-piston connecting said valve, substantially as described.

FREDRIC M. BRO\VN.

Witnesses:

CHARLES B. MASON, WILLIAM H. MARTIN.

